Repos Collection — Web3/Blockchain MVPs

A collection of independent MVP projects showcasing skills in Web3/Blockchain development. Each subfolder is standalone; detailed docs live in each project’s own README.

Repository Map

• evm — EVM Launchkit (Foundry): token factory, tax-enabled ERC20, tests, CI & evidence
• audit_docker_mvp — Smart-contract automated auditing MVP
• defi-audit — Security analysis tools for DeFi protocols
• nft-query — NFT metadata & transaction query tools
• token_api — Token data query & management API

This collection demonstrates backend engineering, on-chain interaction, security auditing, and DevEx.

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Demo Videos

1) EVM Launchkit — Deploy & Verify on Sepolia (Foundry)

• Compile → Deploy (cast) → Constructor args → Etherscan Exact Match → Read checks
• Watch: https://youtu.be/bUFz8v6JHiw

2) Token API — End-to-End (Docker, JWT, Postman)

• Build & start with Docker Compose → Check DB & logs → Generate JWT → Call API with Postman → Verify latency (~1s; cached requests instant) → Confirm logs & DB updates
• Watch: https://youtu.be/bJQyXpvDhhg

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Featured: EVM Launchkit (Foundry)

What it is A practical Foundry template focused on delivery and evidence: token factory + tax-enabled ERC20 (OZ v5), scripts, tests, CI, and reproducible artifacts.

CI & Gas Evidence

• Workflow: GitHub Actions runs forge test -vvv and publishes a gas report (--gas-report).
• Artifacts: Each run uploads gas-ci.txt (downloadable).
• Scope: CI runs in the evm/ subfolder via defaults.run.working-directory: evm.

Quickstart (Sepolia)

# inside ./evm
set -a && source .env && set +a
forge build --build-info

# deploy with cast (robust path)
OWNER_ENV="${TOKEN_OWNER:-$INITIAL_OWNER}"
BYTECODE=$(forge inspect contracts/TaxedERC20.sol:TaxedERC20 bytecode)
TX=$(cast send --rpc-url "$SEPOLIA_RPC_URL" --private-key "$PRIVATE_KEY" \
  --create "$BYTECODE" \
  "constructor(string,string,uint8,uint256,address,uint16,address)" \
  "$NAME" "$SYMBOL" $DECIMALS $INITIAL_SUPPLY "$OWNER_ENV" $TAX_BPS "$TAX_COLLECTOR")
NEW_TOKEN=$(echo "$TX" | awk '/^contractAddress/ {print $2}')

# verify
ARGS=$(cast abi-encode "constructor(string,string,uint8,uint256,address,uint16,address)" \
  "$NAME" "$SYMBOL" $DECIMALS $INITIAL_SUPPLY "$OWNER_ENV" $TAX_BPS "$TAX_COLLECTOR")
forge verify-contract --chain sepolia --constructor-args "$ARGS" \
  --etherscan-api-key "$ETHERSCAN_API_KEY" "$NEW_TOKEN" \
  contracts/TaxedERC20.sol:TaxedERC20 --watch

EVM — Evidence Packs

See the consolidated index: evm/docs/evidence/.

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Productized Services (Fixed Scope)

• #1 – Token Factory (simple ERC20) Delivery: factory contract, scripts, tests, gas report, usage notes.

• #2 – TaxedERC20 (OZ v5) — tax / whitelist / blacklist / pause Delivery: ERC20 with tax via _update hook, owner controls, tests, gas report, evidence pack. Evidence: see Day6 pack above.

For service details or custom extensions, please open an issue or contact me.

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Notes

• Testnet keys are for demo only. Do not reuse on mainnet.
• Some screenshots/links reference the evm/ submodule and CI artifacts.